﻿.boxoverflow .flex {
    display: -ms-flexbox;
}

.boxoverflow .flex > div {
    width:300px;
    height:250px;
    padding:10px;
    margin:0 10px;
    border:1px solid gray;
}

.boxoverflow #hidden {
    overflow-y: hidden;
}

.boxoverflow #scroll {
    overflow-y: scroll;
}